Function useVim

packages/cli/src/ui/hooks/vim.ts:129–785

(buffer: TextBuffer, onSubmit?: (value: string) => void)

 * @returns Object with vim state and input handler
 */
export function useVim(buffer: TextBuffer, onSubmit?: (value: string) => void) {
  const { vimEnabled, vimMode, setVimMode } = useVimMode();
  const [state, dispatch] = useReducer(vimReducer, initialVimState);

  // Sync vim mode from context to local state
  useEffect(() => {
    dispatch({ type: 'SET_MODE', mode: vimMode });
  }, [vimMode]);

  // Helper to update mode in both reducer and context
  const updateMode = useCallback(
    (mode: VimMode) => {
      setVimMode(mode);
      dispatch({ type: 'SET_MODE', mode });
    },
    [setVimMode],
  );

  // Helper functions using the reducer state
  const getCurrentCount = useCallback(
    () => state.count || DEFAULT_COUNT,
    [state.count],
  );

  /** Executes common commands to eliminate duplication in dot (.) repeat command */
  const executeCommand = useCallback(
    (cmdType: string, count: number) => {
      switch (cmdType) {
        case CMD_TYPES.DELETE_WORD_FORWARD: {
          buffer.vimDeleteWordForward(count);
          break;
        }

        case CMD_TYPES.DELETE_WORD_BACKWARD: {
          buffer.vimDeleteWordBackward(count);
          break;
        }

        case CMD_TYPES.DELETE_WORD_END: {
          buffer.vimDeleteWordEnd(count);
          break;
        }

        case CMD_TYPES.CHANGE_WORD_FORWARD: {
          buffer.vimChangeWordForward(count);
          updateMode('INSERT');
          break;
        }

        case CMD_TYPES.CHANGE_WORD_BACKWARD: {
          buffer.vimChangeWordBackward(count);
          updateMode('INSERT');
          break;
        }

        case CMD_TYPES.CHANGE_WORD_END: {
          buffer.vimChangeWordEnd(count);
          updateMode('INSERT');